How to center a view in its container
Swift version: 5.6
There are two ways to center one UIView inside another, depending on whether you use Auto Layout.
If you don’t use Auto Layout, it’s only one line of code:
childView.center = parentView.centerThat sets the position once, so it won’t update when your user rotates their device or if they use something like Slide Over to change the size of your app.
If you’re using Auto Layout, you can center your child view inside its parent like this:
childView.centerXAnchor.constraint(equalTo: parentView.centerXAnchor).isActive = true
childView.centerYAnchor.constraint(equalTo: parentView.centerYAnchor).isActive = trueThose constraints will automatically update as the available space changes.
SAVE 50% To celebrate Black Friday, all our books and bundles are half price, so you can take your Swift knowledge further without spending big! Get the Swift Power Pack to build your iOS career faster, get the Swift Platform Pack to builds apps for macOS, watchOS, and beyond, or get the Swift Plus Pack to learn advanced design patterns, testing skills, and more.
Sponsor Hacking with Swift and reach the world's largest Swift community!
Available from iOS 3.2
Similar solutions…
- How to adjust the size of a view relative to its container
- How to pad a UITextView by setting its text container inset
- How to dynamically adjust the appearance of a view based on its size and location
- How to adjust the position of a view using its offset
- How to fix “Function declares an opaque return type, but has no return statements in its body from which to infer an underlying type”
About the Swift Knowledge Base
This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.
